APFloat.cpp File Reference

#include "llvm/ADT/APFloat.h"
#include "llvm/ADT/APSInt.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/FloatingPointMode.h"
#include "llvm/ADT/FoldingSet.h"
#include "llvm/ADT/Hashing.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Config/llvm-config.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/Error.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/raw_ostream.h"
#include <cstring>
#include <limits.h>

Go to the source code of this file.

Classes
struct	llvm::fltSemantics
struct	llvm::decimalInfo

Namespaces
namespace	llvm
	This is an optimization pass for GlobalISel generic memory operations.
namespace	llvm::detail
	A self-contained host- and target-independent arbitrary-precision floating-point software implementation.

Macros
#define	APFLOAT_DISPATCH_ON_SEMANTICS(METHOD_CALL)
#define	PackCategoriesIntoKey(_lhs, _rhs)
	A macro used to combine two fcCategory enums into one key which can be used in a switch statement to classify how the interaction of two APFloat's categories affects an operation.

Enumerations
enum class	llvm::fltNonfiniteBehavior { llvm::IEEE754 , llvm::NanOnly , llvm::FiniteOnly }
enum class	llvm::fltNanEncoding { llvm::IEEE , llvm::AllOnes , llvm::NegativeZero }

Functions
static constexpr APFloatBase::ExponentType	llvm::exponentZero (const fltSemantics &semantics)
static constexpr APFloatBase::ExponentType	llvm::exponentInf (const fltSemantics &semantics)
static constexpr APFloatBase::ExponentType	llvm::exponentNaN (const fltSemantics &semantics)
static Error	llvm::createError (const Twine &Err)
static constexpr unsigned int	llvm::partCountForBits (unsigned int bits)
static unsigned int	llvm::decDigitValue (unsigned int c)
static Expected< int >	llvm::readExponent (StringRef::iterator begin, StringRef::iterator end)
static Expected< int >	llvm::totalExponent (StringRef::iterator p, StringRef::iterator end, int exponentAdjustment)
static Expected< StringRef::iterator >	llvm::skipLeadingZeroesAndAnyDot (StringRef::iterator begin, StringRef::iterator end, StringRef::iterator *dot)
static Error	llvm::interpretDecimal (StringRef::iterator begin, StringRef::iterator end, decimalInfo *D)
static Expected< lostFraction >	llvm::trailingHexadecimalFraction (StringRef::iterator p, StringRef::iterator end, unsigned int digitValue)
static lostFraction	llvm::lostFractionThroughTruncation (const APFloatBase::integerPart *parts, unsigned int partCount, unsigned int bits)
static lostFraction	llvm::shiftRight (APFloatBase::integerPart *dst, unsigned int parts, unsigned int bits)
static lostFraction	llvm::combineLostFractions (lostFraction moreSignificant, lostFraction lessSignificant)
static unsigned int	llvm::HUerrBound (bool inexactMultiply, unsigned int HUerr1, unsigned int HUerr2)
static APFloatBase::integerPart	llvm::ulpsFromBoundary (const APFloatBase::integerPart *parts, unsigned int bits, bool isNearest)
static unsigned int	llvm::powerOf5 (APFloatBase::integerPart *dst, unsigned int power)
static unsigned int	llvm::partAsHex (char *dst, APFloatBase::integerPart part, unsigned int count, const char *hexDigitChars)
static char *	llvm::writeUnsignedDecimal (char *dst, unsigned int n)
static char *	llvm::writeSignedDecimal (char *dst, int value)
static APFloat	llvm::harrisonUlp (const APFloat &X)
static void	llvm::detail::tcSetLeastSignificantBits (APInt::WordType *dst, unsigned parts, unsigned bits)
LLVM_ABI hash_code	llvm::detail::hash_value (const IEEEFloat &Arg)
LLVM_ABI int	llvm::detail::ilogb (const IEEEFloat &Arg)
LLVM_ABI IEEEFloat	llvm::detail::scalbn (IEEEFloat X, int Exp, roundingMode RoundingMode)
LLVM_ABI IEEEFloat	llvm::detail::frexp (const IEEEFloat &Val, int &Exp, roundingMode RM)
static std::pair< APFloat, APFloat >	llvm::detail::fastTwoSum (APFloat X, APFloat Y)
LLVM_ABI hash_code	llvm::detail::hash_value (const DoubleAPFloat &Arg)
int	llvm::detail::ilogb (const DoubleAPFloat &Arg)
DoubleAPFloat	llvm::detail::scalbn (const DoubleAPFloat &Arg, int Exp, APFloat::roundingMode RM)
DoubleAPFloat	llvm::detail::frexp (const DoubleAPFloat &Arg, int &Exp, APFloat::roundingMode RM)
LLVM_ABI hash_code	llvm::hash_value (const APFloat &Arg)
	See friend declarations above.

Variables
const unsigned int	llvm::maxExponent = 16383
const unsigned int	llvm::maxPrecision = 113
const unsigned int	llvm::maxPowerOfFiveExponent = maxExponent + maxPrecision - 1
const unsigned int	llvm::maxPowerOfFiveParts
static const char	llvm::hexDigitsLower [] = "0123456789abcdef0"
static const char	llvm::hexDigitsUpper [] = "0123456789ABCDEF0"
static const char	llvm::infinityL [] = "infinity"
static const char	llvm::infinityU [] = "INFINITY"
static const char	llvm::NaNL [] = "nan"
static const char	llvm::NaNU [] = "NAN"

Macro Definition Documentation

APFLOAT_DISPATCH_ON_SEMANTICS

#define APFLOAT_DISPATCH_ON_SEMANTICS

(

METHOD_CALL

)

Value:

  do {                                                                         \
    if (usesLayout<IEEEFloat>(getSemantics()))                                 \
      return U.IEEE.METHOD_CALL;                                               \
    if (usesLayout<DoubleAPFloat>(getSemantics()))                             \
      return U.Double.METHOD_CALL;                                             \
    llvm_unreachable("Unexpected semantics");                                  \
  } while (false)

Definition at line 31 of file APFloat.cpp.

PackCategoriesIntoKey

#define PackCategoriesIntoKey	(		_lhs,
			_rhs )

Value:

((_lhs) * 4 + (_rhs))

A macro used to combine two fcCategory enums into one key which can be used in a switch statement to classify how the interaction of two APFloat's categories affects an operation.

TODO: If clang source code is ever allowed to use constexpr in its own codebase, change this into a static inline function.

Definition at line 48 of file APFloat.cpp.

Referenced by llvm::detail::IEEEFloat::compare().